Article
Agriculture, Multidisciplinary
Chika Zukemura, Hiroshi Osari, Teruhito Miyamoto
Summary: This study confirmed the utility of a capacitance sensor called 10HS in converted paddy fields, and proposed a corrected FSC function to determine its practical influence volume. The results showed that the actual influence volume of the sensor is smaller than previously reported, and it was suggested that the sensor should be installed at a specific height.
JARQ-JAPAN AGRICULTURAL RESEARCH QUARTERLY
(2023)
Article
Soil Science
Quanbo Yu, Lingying Xu, Meiyan Wang, Shengxiang Xu, Weixia Sun, Jizhou Yang, Yijie Shi, Xuezheng Shi, Xinqiao Xie
Summary: Soil structure degradation leads to the decrease of water-stable soil aggregates, which in turn reduces the protective effect of soil organic carbon. The loss of O-alkyl C has a significant impact on the stability of soil aggregates after conversion from paddy fields to vegetable fields.
EUROPEAN JOURNAL OF SOIL SCIENCE
(2022)
Article
Soil Science
Quan-Cheng Wang, Weiqi Wang, Yong Zheng, Tony Vancov, Yunying Fang, Yun Xia, Xuyang Liu, Yuexin Fan, Zhihua Wei, Liuming Yang
Summary: Land-use changes have a profound effect on the composition of soil organic carbon. Converting paddy fields to upland fields leads to a decrease in fungal and bacterial abundance and a decline in SOC, total lignin phenols, and amino sugars.
Article
Environmental Sciences
Sanghyun Park, Hyeonjun Kim, Choelhee Jang, Deokhwan Kim
Summary: This study used the integrated surface-groundwater model CAT to simulate the streamflow of a sub-catchment in the Boryeong Dam catchment. The results showed that agricultural reservoir supply water increased the direct flow, baseflow, and groundwater recharge in the catchment, and had a significant effect on soil moisture and groundwater levels in irrigated paddy fields.
Article
Soil Science
Jui-Chu Yu, Po-Neng Chiang, Yen-Jen Lai
Summary: This study in afforested sugarcane fields on Entisols in Taiwan found that soil respiration (Rs) showed significant seasonal and spatial variations, largely influenced by soil temperature and moisture. Soil temperature was identified as the primary driver of temporal variability in Rs, with soil moisture playing a secondary role, particularly during the wet season.
Article
Soil Science
Xiaomin Yang, Zhaoliang Song, Lukas Van Zwieten, Xiaole Sun, Changxun Yu, Weiqi Wang, Congqiang Liu, Hailong Wang
Summary: Silicon (Si) plays a crucial role in rice health and production by mitigating various stresses, but continual off-farm export of grains may lead to Si deficiency. Current levels of plant available Si (PASi) in China's rice paddies remain uncertain, with factors like soil properties and climate influencing Si content. A nationwide study from 2016 to 2019 revealed a decrease in Si content compared to two decades ago, with over 65% of paddy fields in China experiencing PASi deficiency, particularly in southern regions.
Article
Environmental Sciences
Naoya Katsumi, Takasei Kusube, Seiya Nagao, Hiroshi Okochi
Summary: Japanese agriculture utilizes a significant amount of plastic, particularly in the form of fertilizer-containing plastic microcapsules. These microcapsules have been found to accumulate in paddy fields at concentrations much higher than those in other countries, potentially impacting the soil environment. Proper assessment of the impact of these high concentrations of microcapsules is necessary for future agricultural practices.
Article
Chemistry, Analytical
Bogdan Ruszczak, Dominika Boguszewska-Mankowska
Summary: This study aimed to recalibrate and accurately characterize commonly used smart soil-moisture sensors using computational methods. It proposed an ensemble learning algorithm to improve potato root moisture estimation and the performance of simple moisture sensors. The results showed that the median moisture estimation error could be reduced from 2.035% for the baseline model to 0.808% using the Extra Trees algorithm.
Article
Environmental Sciences
Chunfeng Ma, Shuguo Wang, Zebin Zhao, Hanqing Ma
Summary: The study utilized Sensitivity Analysis to investigate the effects of soil and vegetation parameters on the backscatters of Sentinel-1 SAR data. The findings contribute to improving the estimation of soil moisture and vegetation parameters through SAR-based methods.
Article
Computer Science, Information Systems
Yun-Wei Lin, Yi-Bing Lin, Hui-Nien Hung
Summary: The article introduces the CalibrationTalk mechanism to address the important issue of sensor failure detection and calibration in IoT applications, using smart agriculture as an example. Through measurements and analytical modeling, a method for detecting sensor failures within a specific time frame is proposed, enabling automatic calibration of sensors to resolve inaccuracies caused by aging.
IEEE INTERNET OF THINGS JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
John Beale, Toby Waine, Jonathan Evans, Ronald Corstanje
Summary: The article introduces the method of using synthetic aperture radar technology for high spatial resolution mapping of soil moisture, and compares and studies the verification at different depths, the results show that verification at different depths can improve accuracy.
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
(2021)
Article
Environmental Sciences
Na Yang, Feng Xiang, Hengjie Zhang
Summary: This paper investigates the vertical distribution characteristics of surface soil moisture using in situ data from the International Soil Moisture Network and compares them with four microwave satellite remote sensing products. The study finds significant stratification characteristics in surface soil moisture and a potential depth mismatch in the data validation. The satellite retrievals show a higher correlation with the field measurements at a depth of 5 cm/2 in, with SMAP L4 having the smallest difference from the in situ data.
Rating: 8/10. The paper provides important insights into the vertical distribution of surface soil moisture and highlights the potential limitations in data validation. The findings have implications for improving the accuracy of satellite retrievals and understanding soil moisture dynamics
Article
Engineering, Environmental
Yan Wang, Junjie Li, Yue Xu, Timothy F. M. Rodgers, Meijun Bao, Feng Tan
Summary: Rice and maize, two main crops in Northeast China, displayed different OPE concentrations in their soil-crop systems. The OPE concentrations were higher in paddy soil compared to maize soil. The study also indicated that other processes like growth dilution play a significant role in understanding OPE levels in plants.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Soil Science
Yinghao Li, Guimin Xia, Qi Wu, Wei Chen, Wenhua Lin, Zhongxiao Zhang, Yinglong Chen, Taotao Chen, Kadambot H. M. Siddique, Daocai Chi
Summary: The study demonstrates that zeolite and potassium applications, whether used alone or in combination, significantly increase rice grain yield and economic benefits. The recommended treatment of 5 t ha(-1) zeolite with 30 kg ha(-1) potassium fertilizer showed the highest increase in grain yield and economic benefits compared to commonly used practices. This indicates that the use of zeolite and potassium together can improve productivity and profitability in paddy cultivation.
Article
Agronomy
Juwon Shin, Jinho Won, Seong-Min Kim, Dae-Cheol Kim, Yongjin Cho
Summary: The study aimed to construct a map of expected fertilization rates for nitrogen and phosphorus based on soil sample measurements and identify the spatial variabilities of salt-affected paddy fields in Korea. Soil samples from different sectors of four paddy field lots were collected and analyzed for various components. The expected fertilization rates were derived using a model and spatial correlation was determined using a spherical variogram.